JPH0247936B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of operating a grain drying apparatus for drying grains using drying air.

[Conventional technology]

In order to dry the grains, a circulating grain drying device is used, which circulates and flows the grains in a grain tank while supplying drying air to dry the grains.

In this circulation type grain drying device, an air guide path and an air exhaust path are provided, and a grain layer in which grains flow down is formed between the air guide path and the air exhaust path. The drying air generated by the drying air generating means is sucked by the suction/exhaust fan, sent to the grain layer from the air guide path, and then exhausted from the air exhaust path. At this time, the grains located in the grain layer are dried.

However, in this type of circulation type grain drying device, not only the drying air generated by the drying air generating means in the air passage provided on the side wall of the machine body but also flows into the machine body through the joints of the machine wall. outside air is mixed in.

For this reason, if a configuration is adopted in which drying air is passed through air channels placed near both sides of the aircraft before drying operations, the humidity of the drying air will increase in a high-humidity atmosphere, and the high-temperature drying air will cool down in low-temperature conditions. The drying efficiency will change depending on the outside air conditions at the installation location.

Conversely, if the drying air is passed near both sides of the machine after drying, the temperature and humidity of the drying air before drying will not be affected by the outside air, but the required driving force of the suction/exhaust fan will increase. become.

[Problem that the invention seeks to solve]

The present invention has been made in consideration of the above facts, and an object of the present invention is to obtain a method of operating a grain drying apparatus that can be operated efficiently according to outside air conditions and can reduce costs.

[Means for solving problems]

A method of operating a grain drying device according to the present invention includes a first air passage arranged on a side of the machine body, and a grain layer surrounded by a grain layer through which grains flow down, and the grain layer is exposed to the first air flow. and a second air path interposed between the grain drying device and the grain layer, and the grain drying device is operated such that the first air path and the second air path can be ventilated through the grain layer. In doing so, under high temperature or low humidity outside air conditions, the drying air generating means is communicated with the first air path, the suction exhaust fan is communicated with the second air path, and the drying air is transferred to the second air path. From the first air passage through the grain layer to the second
and under low temperature or high humidity outside air conditions, a dry air generating means is communicated with the second air path and a suction exhaust fan is communicated with the first air path,
It is characterized in that drying air is sent from the second air path through the grain layer to the first air path.

Therefore, according to the present invention, under high temperature or low humidity outside air conditions, drying air is supplied from the first air path to the grain layer, so that the drying air is sucked by the suction exhaust fan and sent to the grain layer. The wind generated by the drying wind is not only the drying wind generated by the drying wind generation means, but also the outside air flowing into the interior of the fuselage through the joints on the side walls of the fuselage. layer. Therefore, high-temperature or low-humidity outside air can be used as drying air, and the required amount of heat from the drying air generating means can be reduced, thereby reducing costs.

On the other hand, under low-temperature or high-humidity outside air conditions, by sending drying air from the second air path to the grain layer, the air sucked by the suction exhaust fan and sent to the grain layer can be dried. Only the drying air generated by the wind generation means and passed through the inside of the machine body, and the outside air flowing into the machine body through the joint in the side wall of the machine body is discharged as is without being fed to the grain layer. Therefore, even under low temperature or high humidity outside air conditions,
The drying air fed to the grain layer is not adversely affected by a drop in temperature or an increase in humidity.

〔Example〕

FIG. 1 shows a cross-sectional view of a grain drying device 10 according to the present invention, and FIG. 2 shows a cross-sectional view taken along the line--in FIG.

The body 12 is an outer frame of the grain drying device 10, which is constituted by a pair of left and right machine walls 14, a pair of front and rear machine walls 16, a ceiling wall 18, and a bottom wall 20, and is shaped like a vertically high box.

The upper inner cavity of the fuselage 12 serves as a grain tank 22.
Further, a drying section 24 is provided at the bottom. In the drying section 24, a pair of breathable air passage partition walls 26 are provided in parallel to the machine walls 14 in the left and right center portions of the machine body, and span between the machine walls 16 so as to face each other. At the upper end of the air passage partition wall 26, a non-ventilated partition wall 28 having an inverted V-shaped cross section is formed so as to be continuous with the air passage partition wall 26.
6 and the partition wall 28 is the air passage 30
It is becoming.

In the lateral direction of the air passage bulkhead 26 (on the side of the machine wall 14), a pair of permeable air passage bulkheads 32, 32A, which are parallel to the air passage bulkhead 26 and parallel to each other, are spanned between the machine walls 16, facing each other. ing. Air passage partition walls 32, 32
Similar to the partition wall 28, an inverted V-shaped non-ventilated partition wall 34 is continuously stretched over the upper part of A, and the air passage partition wall 3
2, 32A and the partition wall 34 form an air passage 36 as a second air passage. Therefore, the longitudinal directions of the air passage 36 and the air passage 30 are parallel to each other.

Further, in the lateral direction of the air passage bulkhead 32A (machine wall 14
On the side), an air permeable air passage partition wall 26A is spanned between the machine wall 14 and the machine wall 16 in parallel with the air passage partition wall 32A. The bulkhead 3 is connected so that the non-ventilated bulkhead 38 continues from the upper end of the air passage bulkhead 26A to the inner surface of the machine wall 14.
4, and an air passage 30A as a first air passage is formed between the air passage partition wall 26A, the machine wall 14, and the partition wall 38. Therefore, the longitudinal direction of this air passage 30A is also parallel to the air passages 36 and 30.

Between these air channels is a grain layer 40 through which the grains in the grain tank 22 flow down. In other words, the grains in the grain layer 40 flow down to the bottom of the grain layer 40 while receiving the drying wind sent from the air passage, and the sent drying wind absorbs the moisture of the grains and dries the grains, and then is transferred to another wind. It is now being discharged from the road.

Each lower end of the grain layer 40 has an outlet 4 formed between the lower end inclined portions of the air passage partition wall 32 and the air passage partition wall 26.
1, and is connected to a shutter drum 42 via an outlet 41 formed between the lower end slopes of the air passage partition wall 26A and the air passage partition wall 32A.

The shutter drum 42 has a hollow cylindrical shape with a horizontal axis, and a slit-like notch with a predetermined width along the axial direction is formed in a part of the outer periphery. This shutter drum 42 rotates around its axis so that the notch and the outlet 41 face each other, so that the grains in the flow path 40 are transferred to the shutter drum 42 through the notch.
When the shutter drum 42 rotates and the notch is positioned downward, the grains that have flowed in are discharged.

A pouring plate 44 is arranged below the shutter drum 42 and tapers downward toward the center between the machine walls 14. Therefore, the grains discharged from the shutter drum 42 are transferred to the pouring sink plate 44.
As a result, the grains are accumulated in two rows approximately in the center between the grains 14.

A lower screw conveyor 46 for conveying grains is disposed at each lower end of the pouring sink plate 44. The lower screw conveyor 46 is arranged in two parallel rows in the longitudinal direction of the grain drying device 10, and the spiral blades on the outer periphery send out the grains that enter between these to the left in FIG. It's getting old.

At the terminal end of the lower screw conveyor 46 in the grain conveyance direction, a downwardly inclined conveyance guide plate 48 is disposed so as to be connected and communicated with each lower screw conveyor 46 . Further, the lower end of this conveyance guide plate 48 is adapted to supply grains into a bucket of a bucket conveyor 50 erected on the outside of the machine wall 16 .

Inside this bucket conveyor 50, grain conveyor buckets are attached to the endless conveyor at regular intervals, and the grains sent from the lower screw conveyor 46 via the conveyance guide plate are transported to the top of the grain drying device 10. It can be lifted and transported to the top. Therefore, the grains flowing down the transport guide plate 48 are lifted and transported to the top of the grain drying device 10 via the transport bucket.

One end of an upper screw conveyor 52 corresponds to the upper end of the bucket conveyor 50, and is adapted to receive the lifted and conveyed grains. The other end of the upper screw conveyor 52 extends to the longitudinal center of the grain drying device 10, and a rotary equalizer 54 whose axis is vertical is arranged directly below the other end of the upper screw conveyor 52. ing. Therefore, the grains conveyed to the upper center of the grain drying device 10 by the upper screw conveyor 52 fall onto the rotary equalizer 54 .
When the grain rotates, centrifugal force causes the grain to be evenly distributed into the grain tank 22 inside the fuselage 12.

A tensioning hopper 56 is provided at the lower part of the machine wall 14 so that grain can be tensioned into the machine body 12.

Now, as shown in FIG. 2A, a communication air passage 60 is formed in the front side machine wall 16 in the vertical direction. A blower duct 61 that opens toward the outside of the body is attached to a part of the communication air passage 60, and a burner 58 for generating dry air is housed inside. This communication air passage 60 communicates with one longitudinal end of the air passage 36 within the fuselage 12. Therefore, the drying air generated by the burner 58 is sent into the air passage 36 through the communication air passage 60.

On the other hand, the rear side machine wall 16 has a communication air passage 6 in the vertical direction.
4 is formed. A part of the communication air passage 64 is attached with an air exhaust duct 63 that opens toward the outside of the body, similar to the communication air passage 60, and a suction exhaust fan 62 is housed inside. This communication air passage 64 communicates with one end in the longitudinal direction of the air passages 30 and 30A in the fuselage 12. Therefore, the suction/exhaust fan 62 sucks the dry air from the burner 58, sends it from the air passage 36 through the downstream passage 40 to the air passages 30 and 30A, and discharges it to the outside of the fuselage 12 through the communication air passage 64. It's becoming like that.

The blower duct 61 and the exhaust duct 63 can be attached to either the front side machine wall or the rear side machine wall, and are interchangeable. Therefore, as shown in FIG. 2B, it is possible to attach an air exhaust duct 63 to the front side machine wall 16 and an air blow duct 61 to the rear side machine wall 16. In this case, contrary to the above, the drying air generated by the burner 58 is moved from the air passages 30 and 30A to the flow passage 40 by the suction force of the suction exhaust fan 62.
is fed to the air passage 36 through the communication air passage 60,
The air is discharged to the outside of the aircraft body 12 via the suction/exhaust fan 62.

Next, the operation of the grain drying device 10 having the above configuration will be explained.

First, in the usage state shown in FIG.
The state in which it is attached to the aircraft wall 16 on the rear side will be explained. The circulation system devices (lower screw conveyor 46, bucket conveyor 50, upper screw conveyor 52, and rotary equalizer 54) of the grain drying device 10 are driven to load the grains.

At this point, the loading hopper 56 on the lower side of the grain drying device 10 is opened and the grains are loaded into the machine body 12. The loaded grains are guided by the loading sink plate 44 and flowed down in two rows to the lower center of the machine body 12 (the position where the lower screw conveyor is disposed).

Further, the packed grains are conveyed to the bucket conveyor 50 side by the lower screw conveyor 46. Since a downwardly inclined conveyance guide plate 48 is connected and communicated with the terminal end in the conveyance direction, the grains are sequentially conveyed along the conveyance guide plate 48 to the bucket conveyor 50.
It is transported to the bottom. Therefore, the grains flowing down the conveyance guide plate 48 are separated and lifted by the bucket of the rotating bucket conveyor 50.

The grains lifted and conveyed above the machine body 12 by the bucket conveyor 50 are transferred to the screw conveyor 5.
2 to the upper center of the machine body 12 and stored in the grain tank 22 in the machine body 12 by a rotary equalizer 54.

Furthermore, after a certain amount of grains are stored in the grain tank 22, the shutter drum 42 is rotated to feed out the grains. And the burner 5 connected to the fuselage 12
When the air suction fan 8 is ignited and the suction/exhaust fan 62 is driven, dry air is sent to each air path through the communication air path.

This dry air is sucked by the suction exhaust fan 62, passes through the communication air path 60, reaches the air path 36, and reaches the air path partition walls 32, 3.
2A and is directly fed to the grains in the grain layer 40. The drying wind that has absorbed the moisture of the grains is sent to the air passage partition wall 2.
Passing through 6 and 26A, it flows to air passages 30 and 30A,
Furthermore, it is discharged to the outside of the grain drying device 10 through the communication air passage 64.

In this way, the high temperature drying air generated by the burner 58 is sent to each grain layer 40 through the air passage 36 arranged inside the machine, so that the grain is not affected by the temperature and humidity of the outside air. Can only be used for drying grains. In addition, outside air that has flowed into the aircraft through the joints of the aircraft wall is mixed into the air passage 30A, which is located on the outermost side of the aircraft among the air passages, and as a result, the amount of air sucked by the suction exhaust fan 62 is reduced. However, since the air is discharged after the grains have been dried, there is no adverse effect on the drying process. Since the drying process can be performed without being affected by the outside air, it is particularly suitable for use under high humidity or low temperature conditions.

On the other hand, since the burner 58 and the suction/exhaust fan 62 can be attached interchangeably, FIG.
As shown in the figure, a suction exhaust fan 62 can be arranged on the front side machine wall 16, and a burner 58 can be arranged on the rear side machine wall 16.

In this case, contrary to the above, the drying air is sucked by the suction/exhaust fan 62 and passes through the communication air path 64 to the air path 30,
30A, passes through the air path partition walls 26, 26A, and is directly fed to the grains in the grain layer 40. The drying wind that has absorbed the moisture of the grains passes through the air passage partition walls 32, 32.
A, flows to the air passage 36, and further flows to the communication air passage 6.
0 and is discharged to the outside of the grain drying device 10.

Since the high-temperature drying air generated by the burner 58 is sent to each grain layer 40 through the air passages 30A arranged on both sides of the machine body, under high temperature or low humidity outside air conditions, the seam of the machine wall Efficiency is improved by reusing the outside air that has flowed into the aircraft through the air. Furthermore, since only the amount of drying air passing through the grain layer 40 needs to be sucked, the amount of suction air required by the suction/exhaust fan is reduced compared to the above-mentioned case, making it suitable for use under high temperature or low humidity conditions and resulting in energy savings.

Thereafter, the grains in the grain layer 40 are transferred to the grain drying device 1 by the pouring sink plate 44 after passing through the outlet 41.
Grain is collected along the lengthwise direction approximately at the center below 0.
The collected grains are taken out from a grain outlet (not shown) after the above-described circulation action is repeated within the machine body 12 as necessary until a desired moisture content is reached.

〔Effect of the invention〕

The present invention achieves the effect of reducing costs by using high temperature or low humidity outside air and not being adversely affected by low temperature or high humidity outside air by creating ventilation conditions that match the outside air conditions. have.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a grain drying device according to the present invention;
FIG. 2 is a sectional view taken along the line of FIG. 1. 30, 30A...Air path, 36...Air path, 40...
... Grain layer, 58 ... Burner, 60 ... Communication air passage,
61...Blower duct, 62...Suction exhaust machine, 63
...Exhaust duct, 64...Communication air duct.

Claims (1)

[Scope of Claims] 1. A first air passage disposed on the side of the fuselage; and a grain layer surrounded by a grain layer through which grains flow down, and the grain layer is interposed between the first air passage and the first air passage. When operating a grain drying device, the grain drying device is provided with a second air path arranged in parallel with each other, and the first air path and the second air path can be ventilated through the grain layer. Under high temperature or low humidity outside air conditions, the drying air generation means is communicated with the first air path, the suction exhaust fan is communicated with the second air path, and the drying air is removed from the first air path. the dry air generating means is communicated with the second air path and a suction exhaust fan is communicated with the first air path under low temperature or high humidity outside air conditions. A method for operating a grain drying apparatus, characterized in that drying air is sent from the second air path through the grain layer to the first air path.